20465568 has 48 divisors (see below), whose sum is σ = 59693760. Its totient is φ = 6821568.

The previous prime is 20465563. The next prime is 20465587. The reversal of 20465568 is 86556402.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20465563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10980 + ... + 12707.

It is an arithmetic number, because the mean of its divisors is an integer number (1243620).

Almost surely, 2^20465568 is an apocalyptic number.

It is an amenable number.

20465568 is an abundant number, since it is smaller than the sum of its proper divisors (39228192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20465568 is a wasteful number, since it uses less digits than its factorization.

20465568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23706 (or 23692 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 20465568 is about 4523.8885927927. Note that the first 3 decimals coincide. The cubic root of 20465568 is about 273.5318697704.

The spelling of 20465568 in words is "twenty million, four hundred sixty-five thousand, five hundred sixty-eight".